{"id":3534,"date":"2023-10-11T10:27:47","date_gmt":"2023-10-11T10:27:47","guid":{"rendered":"https:\/\/schoolbushelp.gregmuri.com\/?page_id=3534"},"modified":"2025-12-07T12:31:24","modified_gmt":"2025-12-07T12:31:24","slug":"pre-trip-air-leakage-rate-test","status":"publish","type":"page","link":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/pre-trip-air-leakage-rate-test\/","title":{"rendered":"Pre Trip &#8211; Air Leakage Rate Test"},"content":{"rendered":"\n<div class=\"wp-block-group has-background-background-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--20);padding-right:0;padding-bottom:var(--wp--preset--spacing--20);padding-left:0\">\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\"\/>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link has-foreground-color has-luminous-vivid-amber-background-color has-text-color has-background has-tiny-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/schoolbushelp.gregmuri.com\/index.php\/pre-trip-air-gauges-and-governor-cutoff\/\" style=\"border-radius:27px;padding-top:0;padding-right:var(--wp--preset--spacing--20);padding-bottom:0;padding-left:var(--wp--preset--spacing--20)\">&lt;&lt; Prev<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-buttons is-content-justification-right is-layout-flex wp-container-core-buttons-is-layout-765c4724 wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--2\"><a class=\"wp-block-button__link has-foreground-color has-luminous-vivid-amber-background-color has-text-color has-background has-tiny-font-size has-custom-font-size wp-element-button\" href=\"https:\/\/schoolbushelp.gregmuri.com\/index.php\/pre-trip-air-warning-devices-test\/\" style=\"border-radius:25px;padding-top:0;padding-right:var(--wp--preset--spacing--20);padding-bottom:0;padding-left:var(--wp--preset--spacing--20)\">Next &gt;&gt;<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--40)\">\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:75%\">\n<ul class=\"wp-block-list\">\n<li>Turn ignition key to on position<\/li>\n\n\n\n<li>Release Parking Brake<\/li>\n\n\n\n<li>Apply and hold Service Brake<\/li>\n\n\n\n<li>Allow pressure gauges to stabilize<\/li>\n\n\n\n<li>Continue to hold Service Brake for one minute<\/li>\n\n\n\n<li>Pressure should not drop more than 3 psi.<\/li>\n\n\n\n<li>Release Service Brake<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\" style=\"padding-top:var(--wp--preset--spacing--40);padding-bottom:var(--wp--preset--spacing--40)\">\n<figure class=\"wp-block-audio\"><audio controls src=\"https:\/\/schoolbushelp.gregmuri.com\/wp-content\/uploads\/2025\/10\/Air-Leakage-Rate-Test.mp3\"><\/audio><\/figure>\n\n\n\n<p><strong><em>&#8220;Next I will make sure there is no excessive air leakage. This is done by releasing the Parking Brake and applying the Service Brake, which is held throughout the test. &#8220;<\/em><\/strong><br>{apply service brake}<\/p>\n\n\n\n<p>&#8220;<strong><em>After an initial loss of air and the gauges stabilize there can then be no more than <mark style=\"background-color:#fafa04\" class=\"has-inline-color\">three (3) psi <\/mark>loss in one minute.&#8221;<\/em><\/strong><\/p>\n\n\n\n<p>{wait for gauges to stabilize}<\/p>\n\n\n\n<p><strong><em>&#8220;The gauges have stabilized. Would you please time me?&#8221;<\/em><\/strong><\/p>\n\n\n\n<p>{after one minute or at the instruction of the examiner the test concludes}<\/p>\n\n\n\n<p><strong><em>&#8220;There was less than a three (3) psi loss. I will now release the service brake and proceed to the low air pressure warning test.&#8221;<\/em><\/strong><\/p>\n\n\n\n<p>{release service brake}<\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:25%\">\n<figure class=\"wp-block-image aligncenter size-large has-custom-border is-style-rounded\"><img loading=\"lazy\" decoding=\"async\" width=\"768\" height=\"1024\" src=\"https:\/\/schoolbushelp.gregmuri.com\/wp-content\/uploads\/2023\/10\/IMG_3863-768x1024.jpg\" alt=\"\" class=\"wp-image-4038\" style=\"border-radius:15px\" srcset=\"https:\/\/schoolbushelp.gregmuri.com\/wp-content\/uploads\/2023\/10\/IMG_3863-768x1024.jpg 768w, https:\/\/schoolbushelp.gregmuri.com\/wp-content\/uploads\/2023\/10\/IMG_3863-225x300.jpg 225w, https:\/\/schoolbushelp.gregmuri.com\/wp-content\/uploads\/2023\/10\/IMG_3863-1152x1536.jpg 1152w, https:\/\/schoolbushelp.gregmuri.com\/wp-content\/uploads\/2023\/10\/IMG_3863-1536x2048.jpg 1536w, https:\/\/schoolbushelp.gregmuri.com\/wp-content\/uploads\/2023\/10\/IMG_3863-scaled.jpg 1920w\" sizes=\"auto, (max-width: 768px) 100vw, 768px\" \/><\/figure>\n<\/div>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;Next I will make sure there is no excessive air leakage. This is done by releasing the Parking Brake and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":145,"comment_status":"closed","ping_status":"closed","template":"page-no-title","meta":{"_eb_attr":"","footnotes":""},"categories":[6],"tags":[41],"folder":[29],"class_list":["post-3534","page","type-page","status-publish","hentry","category-pretrip","tag-enginestart"],"_links":{"self":[{"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/pages\/3534","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/comments?post=3534"}],"version-history":[{"count":16,"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/pages\/3534\/revisions"}],"predecessor-version":[{"id":5475,"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/pages\/3534\/revisions\/5475"}],"wp:attachment":[{"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/media?parent=3534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/categories?post=3534"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/tags?post=3534"},{"taxonomy":"folder","embeddable":true,"href":"https:\/\/schoolbushelp.gregmuri.com\/index.php\/wp-json\/wp\/v2\/folder?post=3534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}